Bio‑oil/Pre‑treated Waste PE Composite Modified Asphalt

被引：0

作者：

Feng X. ^{[1
]}

Fu H. ^{[1
]}

机构：

[1] School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha

来源：

Jianzhu Cailiao Xuebao/Journal of Building Materials | 2024年 / 27卷 / 01期

关键词：

bio‑oil; low temperature crack resistance; modified asphalt; pre‑treated waste PE; storage stability;

D O I：

10.3969/j.issn.1007-9629.2024.01.006

中图分类号：

学科分类号：

摘要：

To address the issues of poor storage stability and low‑temperature crack resistance in waste plastic‑modified asphalt，a twin‑screw extruder was employed to pretreat waste polyethylene（PE）and subsequently it was combined with bio‑oil to produce bio‑oil/pretreated waste PE composite modified asphalt. Storage stability，low‑temperature crack resistance，and high‑temperature stability of modified asphalt were examined by separation test，rheological property test，fluorescence microscopy test，and Fourier‑transform infrared spectroscopy test. The results show that the density of the pretreated waste PE is close to that of asphalt，and the presence of more polar groups and C=C structures increase its chemical activity，significantly enhancing the storage stability of waste PE modified asphalt. The bio‑oil/pretreated waste PE composite modified asphalt forms a continuous network structure，which further improves the storage stability of waste PE modified asphalt and significantly increases its low‑temperature crack resistance，while reduces its high‑temperature stability. © 2024 Tongji University. All rights reserved.

引用

页码：37 / 45and75

页数：4538

共 26 条

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